A21
Tularemia
Non-billable headerNot valid on its own. Use one of the more specific codes under it.
A21 is a non-billable ICD-10-CM code category for tularemia. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are A21.0 Ulceroglandular tularemia, A21.1 Oculoglandular tularemia, A21.2 Pulmonary tularemia, A21.3 Gastrointestinal tularemia and 3 more. Its coding notes include a Use additional code instruction and 5 Excludes2 entries.
Use additional code
Add the listed code as a secondary code, if known.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (5 notes)
Inherited from Chapter 1 Certain infectious and parasitic diseases
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Includes
Further defines or gives examples of the content of the category.
This code
- deer-fly fever
- infection due to Francisella tularensis
- rabbit fever
Also from chapter/block level (1 note)
Inherited from Chapter 1 Certain infectious and parasitic diseases
- diseases generally recognized as communicable or transmissible